光栅子结构对光纤光栅特性的影响

Effects of Grating Substructures on the Spectral Characteristics of Fiber Bragg Gratings

用传输矩阵法对具有不同参数的λ／４移相结构、多节λ／４移相结构、有效折射率调制结构、耦合系数调制结构和“缝合”误差结构等五种光栅子结构进行了数值模拟计算。模拟结果解释了作者研制的均匀光纤光栅、相移光纤光栅的传输谱，也验证了其他研究小组发表的实验结果。通过对各种结构的系统研究，提出了一些新的利用光纤光栅的设想。

Five types of grating substructure including quarter wavelength shift, multiple quarter wavelength shift, tapped effective refractive index, tapped coupling coefficient and “stitching” are numerically analyzed using the transfer matrix method. The numerical results agree well with the author′s experimental results and other published results. By a systematic investigation of five substructures with different parameters, some new applications of fiber Bragg gratings are proposed.